package com.example.hello;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       // TextView tv_hello=findViewById(R.id.tv_hello);
        //tv_hello.setText("今天天气真热阿，火辣辣的");
        //tv_hello.setTextColor(Color.RED);
        //tv_hello.setTextSize(30);
        //Toast.makeText(this, "xxx", Toast.LENGTH_SHORT).show();
    }
}